I would 100% rather have riser bars over flipped stems - which look like a pigs ear to my eyes. There are quite a lot on AliExpress because they are fashionable at the moment; either for gravel bikes or road bikes trying to look like a poor mans Y1RS or Factor One.
You can get bars with 4cm of rise, which is really quite a lot, and done right it can look purposeful and aero rather than 'I've done my back in'.
Possibly a set of £500 Winspace Hyper2 integrated bar/stem might be overkill for a 10 year old rim brake bike, but there are considably cheaper separate bars from Balugoe, Bucklos and Kocvelo.